package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和口味
     * @param dishDTO
     * @return
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long id = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
        //向口味表插入n条数据
        dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     *菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);

        long total = page.getTotal();//获取数据总数
        List<DishVO> records = page.getResult();//获取当前页数据

        return new PageResult(total,records);
    }

    /**
     * 菜品批量删除
     * @param ids
     * @return
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //查询当前菜品是否起售，如果起售了就不能删除，会抛出业务异常
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //查询当前菜品是否关联了套餐，如果关联了就抛出业务异常
            List<Long> setmealIds= setmealDishMapper.getSetmealIdsByDishIds(ids);
            if ((setmealIds != null) && (setmealIds.size() > 0)) {
                throw  new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
        //删除菜品表
/*        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味表
            dishFlavorMapper.deleteByDishId(id);
        }*/
        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查询菜品口味数据
        List<DishFlavor> dishFlavors =  dishFlavorMapper.getByIdDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //根据菜品id修改菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //删除原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //插入新口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 启用禁用菜品
     * @param status
     * @param id
     * @return
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //TODO 后续开发后套餐，要增加如果套餐绑定菜品则不可禁用

/*     List<SetmealDish> setmealDishes = setmealDishMapper.getByDish(id);

       if (setmealDishes != null && setmealDishes.size() > 0) {
            throw  new SetmealEnableFailedException(MessageConstant.DISH_BY_SETMEAL);
        }else {*/
            Dish dish = Dish.builder()
                    .status(status)
                    .id(id)
                    .build();
            dishMapper.update(dish);
/*        }*/

    }

        /**
         * 条件查询菜品和口味
         * @param dish
         * @return
         */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByIdDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 根据菜品分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<DishDTO> getCategoryId(Long categoryId) {
        List<DishDTO>  dishDTO = dishMapper.getCategoryId(categoryId);
        return dishDTO;
    }

}

